What "informal institutions" are — and why the term matters
A useful starting point is Douglass North's simple framing: institutions are "the rules of the game," shaping incentives and the direction of change. That framing is often quoted, but its practical implication is sometimes missed: if outcomes diverge from what formal rules predict, it is usually because other rules — unwritten but stable — are structuring behaviour.
Helmke and Levitsky provide one of the clearest political science definitions: informal institutions are socially shared rules, usually unwritten, that are created, communicated, and enforced outside officially sanctioned channels. Crucially, they show that informal institutions do not simply "undermine" formal ones. They can complement them, substitute for them, compete with them, or accommodate them — different modes of interaction that produce very different implications for policy and programming.
This matters because a common development reflex is to treat informal rules as a temporary "gap" to be corrected by capacity building, digitization, or legal reform. In reality, informal institutions are often adaptive systems that perform functions formal institutions are not currently able or willing to perform — allocating scarce resources, resolving disputes, providing access or protection, or maintaining political coalitions.
Shadow rules, patronage, and parallel systems: what people mean in practice
In applied governance work, "informal institutions" has a concrete meaning: people know the official process, but they also know the real process.
The real process often involves shadow rules such as: who you must call before submitting an application; which signatures matter and which are ceremonial; which office can accelerate or block a file; which informal payments are expected; which groups can access benefits without meeting formal criteria; and which criteria are applied selectively to maintain control over distribution.
Patronage is a common organizing logic in such systems: the distribution of jobs, contracts, services, or protection through political and social networks in exchange for loyalty. A related and extremely important pattern is the emergence of parallel systems. In fragile states or crisis-affected settings, donors and implementers frequently construct delivery mechanisms that run alongside national systems because national systems are perceived as too weak, too politicized, or too risky.
The problem is that bypass can become self-reinforcing: it may produce faster short-term outputs while reducing incentives to build durable national capacity. Studies on aid and state-building have documented how bypassing can contribute to the establishment of parallel institutions, with long-term effects on state capability and legitimacy.
Why formal frameworks get bypassed — even when everyone agrees with them
A purely technical explanation — "capacity is weak" — is rarely sufficient. Formal frameworks are bypassed for at least four deeper reasons that political economy analysis helps to surface.
First: incentives are misaligned. Formal rules often require behaviour that is individually irrational in the existing incentive structure. When informal obligations and sanctions are stronger than formal ones, behaviour follows informal enforcement.
Second: formal systems can be perceived as illegitimate or irrelevant. Where the state is seen as distant, predatory, or inconsistent, people rationally turn to alternative authorities and networks that feel more predictable. Informal institutions then become the governance layer that offers stability.
Third: formal rules are often too rigid for real-world complexity. Frontline implementation involves ambiguity: cases don't fit categories; rules conflict; resources are insufficient. Informal workarounds emerge because the system must still function. Over time, workarounds become norms; norms become institutions.
Fourth: bypass is sometimes a deliberate strategy of control. Informal institutions can be maintained by powerful actors because they preserve discretion and protect rents. In some settings informal rules compete with formal rules, undermining them, while in others they accommodate them — allowing formal reforms to exist on paper while preserving informal control in practice.
"These dynamics explain a common institutional illusion: reforms appear to be adopted, training is delivered, systems are installed — yet behaviour does not change. The reform has been absorbed as a layer of formality, while the informal system continues to govern outcomes."
The uncomfortable truth for donors and reform actors: bypass has costs
From a donor perspective, bypass often looks like responsible risk management. If national procurement is captured, create a parallel procurement process. If payroll is politicized, pay incentives directly. If data is unreliable, build a project MIS. The short-term logic is understandable — and sometimes necessary.
But institutional bypass is not neutral. A parallel system does not only deliver services; it also reshapes incentives, talent flows, accountability lines, and legitimacy. It can create an institutional ecosystem where the most capable staff move into donor-funded parallel structures, while public systems stagnate. In other words: bypass can solve today's delivery problem while deepening tomorrow's governance problem. That trade-off is often under-acknowledged.
Implications for policy and programming
Diagnostics must be about power and enforcement, not only structures. Classic mapping exercises often describe the formal system. Political economy diagnostics push further: who can block decisions, who controls discretionary resources, what informal networks enforce compliance, and what sanctions matter.
Program logic must treat "implementation" as political behaviour. If informal rules shape who gets access, who benefits, and who is excluded, then targeting, service delivery, and grievance systems are never purely technical. They are distributional — and therefore political.
Anti-corruption and "good governance" approaches need realism about substitution effects. When formal controls are tightened without changing incentives, systems often adapt: corruption shifts to less visible channels; discretion relocates; new gatekeepers emerge.
Formalization agendas should be reframed. Many reforms assume informality is simply a deficit to be eliminated. Yet informality is often a survival logic and a governance substitute. Aggressive formalization without political settlement and credible enforcement may simply displace livelihoods or create new exclusion mechanisms.
Accountability design must recognize parallel systems as a strategic choice, not a default. Building parallel systems may be justified in acute crises. But it should be treated as a decision with explicit long-term costs rather than as a purely technical fix.
Closing reflection
Formal frameworks remain important; they are how legitimacy is expressed and how the state claims authority. But in many reform and fragile settings, formal systems are the visible architecture while informal institutions are the operating system.
Institutions that want to govern outcomes — rather than merely publish reforms — must learn to analyse and design around that operating system. Not to romanticize informality, and not to surrender to it, but to engage reality: the incentives, networks, and enforcement mechanisms that actually shape behaviour.